public static WPF_GUI show_Url(this WPF_GUI wpf_Gui, string url)
 {
     wpf_Gui.show_O2Browser();
     wpf_Gui.statusMessage("Showing URL:{0}", url);
     if (url.uri().HEAD())
     {
         wpf_Gui.O2Browser.open(url);
     }
     else
     {
         wpf_Gui.showOffineMessage("Could not open url: {0}".format(url));
     }
     return(wpf_Gui);
 }
 public static WPF_GUI showMessage(this WPF_GUI wpf_Gui, string title, string message, string url)
 {
     wpf_Gui.show_O2Browser();
     return(wpf_Gui.showMessage(wpf_Gui.O2Browser, title, message, url));
 }
 public static WPF_GUI showOffineMessage(this WPF_GUI wpf_Gui, string message)
 {
     wpf_Gui.show_O2Browser();
     return(wpf_Gui.showOffineMessage(wpf_Gui.O2Browser, message));
 }